Low-viscosity flame-retardant polyurethane metal paint

Abstract

The invention discloses a low-viscosity flame-retardant polyurethane metal paint. The paint comprises the following raw materials in parts by weight: 80 to 85 parts of modified polyurethane, 6 to 9 parts of aqueous organic silicone resin, 12 to 15 parts of aqueous aldehyde-ketone resin, 22 to 25 parts of talcum powder, 3 to 6 parts of bentonite, 5 to 8 parts of kaolin, 8 to 12 parts of calcium carbonate, 10 to 14 parts of nano magnesium hydroxide, 3 to 4 parts of antiseptic, 2 to 3 parts of antifoaming agent, 2.5 to 4 parts of flatting agent, and 5 to 6 parts of pigment; wherein the modified polyurethane is prepared from the following components: polyhexanedioic acid-1,4-butanediol ester diol, polytetrahydrofuran, N,N-bis(2-hydroxyethyl)amino methylene diethyl phosphonate, modified polymerized 1,6-hexamethylene diisocyanate, 1,6-hexanediol, 1,4-butanediol-sodium sulfonate, epoxy resin, cobalt octoate, N-methyl diethanolamine, and diethanolamine, and modified polymerized 1,6-hexamethylene diisocyanate is prepared by the following steps: polymerizing 1,6-hexamethylene diisocyanate and then grafting hydroxyl siloxane to the polymerized 1,6-hexamethylene diisocyanate.

Description

technical field [0001] The invention relates to the technical field of polyurethane coatings, in particular to a low-viscosity flame-retardant polyurethane metal coating. Background technique [0002] Most of the large-scale high-temperature liquid storage tanks or pipelines in my country currently use metal pipes, such as carbon steel and stainless steel. Generally, linings are added to the inner walls of these tanks and pipes or paints are directly painted on the inner walls to improve the high temperature resistance and corrosion resistance of these equipment and prolong their service life. Stainless steel or carbon steel tanks or inner walls of pipes are often protected by composite materials, but the process is complicated, the cost is high, and the popularity is low. At present, it is more common to use suitable coatings on the inner wall surface Form a protective coating, this kind of measure is simple and effective to implement, and the cost of use is low. At prese...

AI Technical Summary

Problems solved by technology

Stainless steel or carbon steel tanks or inner walls of pipes are often protected by composite materials, but the process is complicated, the cost is high, and the popularity is low. At present, it is more common to use suitable coatings on the inner wall surface Form a protective coating, which is simple and effective to implement, and the cost of use is low

At present, most coatings used on the inner wall of high-temperature storage tank pipes are polyurethane coatings, but the polyurethane coatings in the prior art are not ideal in terms of flame retardancy, water resistance, and heat resistance.